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14. Employee Benefits - Asset Allocation (Details)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Weighted Average Asset Allocation at Year-End 100.00% 100.00%
Cash And Cash Equivalents [Member]
   
Weighted Average Asset Allocation at Year-End 0.00% 1.00%
Equity Securities [Member]
   
Weighted Average Asset Allocation at Year-End 87.00% 83.00%
Debt Securities [Member]
   
Weighted Average Asset Allocation at Year-End 13.00% 16.00%